Re: A bad CRT in 465?


Be very sure what is riding on the filaments voltage. In some Tek get the -HV supply DC is on the filaments. I think it is this way is some of the 7K frames and I am sure it is this way on the 576. You also don’t want to turn the bonding wires in to a fuse that will make the tube terminal for sure.


-----Original Message-----
From: <> On Behalf Of Timothy Freeze
Sent: Monday, April 27, 2020 1:55 PM
Subject: Re: [TekScopes] A bad CRT in 465?

So I'm thinking after reading a few CRT rejuvenation links that I may put 6.3 volts DC or maybe a little more on the filament. And tie the grid to the cathode. Sort of a quick and easy attempt at bringing the tube back to life.

Nothing really to lose here and pretty safe I think.

Kindest regards,

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